42398 has 16 divisors (see below), whose sum is σ = 71280. Its totient is φ = 18816.

The previous prime is 42397. The next prime is 42403. The reversal of 42398 is 89324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965 + ... + 1007.

It is an arithmetic number, because the mean of its divisors is an integer number (4455).

2⁴²³⁹⁸ is an apocalyptic number.

42398 is a deficient number, since it is larger than the sum of its proper divisors (28882).

42398 is a wasteful number, since it uses less digits than its factorization.

42398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91.

The product of its digits is 1728, while the sum is 26.

The square root of 42398 is about 205.9077463332. The cubic root of 42398 is about 34.8697197420.

Adding to 42398 its sum of digits (26), we get a palindrome (42424).

The spelling of 42398 in words is "forty-two thousand, three hundred ninety-eight".